And I should mention that ailerons that go up more than down are called "differential", and adjustment may not get you there, depending on how your bellcrank is made. Make sure your aileron bellcrank was made per the plans so that there is more up travel than down travel, with the ratios dependent on the hole spacing on the bellcrank, and also on how the bellcrank is positioned when the ailerons are centered. A "level finding" weighted protractor thing is how the manual expects you to measure aileron movement, which is why it's given in degrees rather than in inches. If you don't have a builders manual for the plane, this might be a wakeup call to buy one. There's a drawing on page 59 of the 1990 version that shows all of the travel limits. Plus or minus 30 degrees for rudder, and plus 30 minus 20 for the elevator.
If you need more information, see the KRnet archive at http://www.maddyhome.com/krsrch/search , where I got 182 hits on messages concerning aileron travel and differntial ailerons, by keying in "differential" as the keyword. Mark Langford N56ML "at" hiwaay.net website at http://www.N56ML.com --------------------------------------------------------